to tammy tatum. >> but tammy told people she didn't like rudy gaytan. >> she complained to her friendst she found rudy creepy and that he made her uncomfortable. >> there were many similarities between tammy tatum's murder and renee dulany's rape. >> the sex assault occurred in the early morning hours. in addition to that there was no forced entry found. there was use of water and a towel to wipe down renee's and tammy's body. >> although there was no semen in tammy's murder case, investigators did find one foreign hair with the root intact. >> when an analyst finds a bulb on a hair, typically that means that the hair had been forcefully removed. >> in 1993 it was difficult to get dna from that hair bulb, but in 2006, it was there for the taking. >> when the dna from the hair had been analyzed, it produced a dna profile that was identified as rudy gaytan. >> gaytan's dna was also found on other items in tammy's apartment. most significantly, the towel that was used to wipe her body. >> clearly, dna made this case. it not only identified the suspect in the case, but it exonerated someon